Messages in this thread Patch in this message | | | Date | Sun, 2 Dec 2007 20:12:45 +0100 | From | Ingo Molnar <> | Subject | [git pull] x86 fixes |
| |
Linus, please pull the latest x86 git tree from:
git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-x86.git
two kexec related hpet fixes from Ogawa Hirofumi. (the #ifdefs will be eliminated later on, these are the tested patches for -rc4)
Thanks!
Ingo
------------------> OGAWA Hirofumi (2): x86: disable hpet on shutdown x86: disable hpet legacy replacement for kdump
arch/x86/kernel/crash.c | 4 ++++ arch/x86/kernel/hpet.c | 14 ++++++++++++++ arch/x86/kernel/reboot_32.c | 4 ++++ arch/x86/kernel/reboot_64.c | 4 ++++ include/asm-x86/hpet.h | 1 + 5 files changed, 27 insertions(+)
Index: linux-x86.q/arch/x86/kernel/crash.c =================================================================== --- linux-x86.q.orig/arch/x86/kernel/crash.c +++ linux-x86.q/arch/x86/kernel/crash.c @@ -22,6 +22,7 @@ #include <asm/nmi.h> #include <asm/hw_irq.h> #include <asm/apic.h> +#include <asm/hpet.h> #include <linux/kdebug.h> #include <asm/smp.h> @@ -140,5 +141,8 @@ void machine_crash_shutdown(struct pt_re #if defined(CONFIG_X86_IO_APIC) disable_IO_APIC(); #endif +#ifdef CONFIG_HPET_TIMER + hpet_disable(); +#endif crash_save_cpu(regs, safe_smp_processor_id()); } Index: linux-x86.q/arch/x86/kernel/hpet.c =================================================================== --- linux-x86.q.orig/arch/x86/kernel/hpet.c +++ linux-x86.q/arch/x86/kernel/hpet.c @@ -446,6 +446,20 @@ static __init int hpet_late_init(void) } fs_initcall(hpet_late_init); +void hpet_disable(void) +{ + if (is_hpet_capable()) { + unsigned long cfg = hpet_readl(HPET_CFG); + + if (hpet_legacy_int_enabled) { + cfg &= ~HPET_CFG_LEGACY; + hpet_legacy_int_enabled = 0; + } + cfg &= ~HPET_CFG_ENABLE; + hpet_writel(cfg, HPET_CFG); + } +} + #ifdef CONFIG_HPET_EMULATE_RTC /* HPET in LegacyReplacement Mode eats up RTC interrupt line. When, HPET Index: linux-x86.q/arch/x86/kernel/reboot_32.c =================================================================== --- linux-x86.q.orig/arch/x86/kernel/reboot_32.c +++ linux-x86.q/arch/x86/kernel/reboot_32.c @@ -11,6 +11,7 @@ #include <linux/reboot.h> #include <asm/uaccess.h> #include <asm/apic.h> +#include <asm/hpet.h> #include <asm/desc.h> #include "mach_reboot.h" #include <asm/reboot_fixups.h> @@ -326,6 +327,9 @@ static void native_machine_shutdown(void #ifdef CONFIG_X86_IO_APIC disable_IO_APIC(); #endif +#ifdef CONFIG_HPET_TIMER + hpet_disable(); +#endif } void __attribute__((weak)) mach_reboot_fixups(void) Index: linux-x86.q/arch/x86/kernel/reboot_64.c =================================================================== --- linux-x86.q.orig/arch/x86/kernel/reboot_64.c +++ linux-x86.q/arch/x86/kernel/reboot_64.c @@ -17,6 +17,7 @@ #include <asm/pgtable.h> #include <asm/tlbflush.h> #include <asm/apic.h> +#include <asm/hpet.h> #include <asm/gart.h> /* @@ -113,6 +114,9 @@ void machine_shutdown(void) disable_IO_APIC(); +#ifdef CONFIG_HPET_TIMER + hpet_disable(); +#endif local_irq_restore(flags); pci_iommu_shutdown(); Index: linux-x86.q/include/asm-x86/hpet.h =================================================================== --- linux-x86.q.orig/include/asm-x86/hpet.h +++ linux-x86.q/include/asm-x86/hpet.h @@ -61,6 +61,7 @@ extern unsigned long force_hpet_address; extern int hpet_force_user; extern int is_hpet_enabled(void); extern int hpet_enable(void); +extern void hpet_disable(void); extern unsigned long hpet_readl(unsigned long a); extern void force_hpet_resume(void);
| |